package com.wwg;

import java.util.Arrays;

/**
 * @author: wwg
 * @date: 2022/2/24 10:43
 */

public class TestWeiyi {

    public static void main(String[] args) {
        System.out.println(1<<4);

        String str = "abcd";

        String[] split = str.split("");
        System.out.printf(split[0]);

    }
}
